Ukraine [may] have launched mass production of the Kontakt-1 dynamic defense system

According to the OSINT account Ukraine Weapons Tracker, the Ukrainian military-industrial complex has launched mass production of the Kontakt-1 dynamic protection system, which is widely used in domestic armored vehicles.

The Kontakt-1 dynamic defense systems are a Soviet/Russian development, so in 2018, Ukrainian counterparts 4C20 and 4C22 (Kontakt-5) were developed to replace the Soviet elements.

However, the photos posted by Ukraine Weapons Tracker do not show 4C20Us, but 4C20s produced in 2023. Ukraine Weapons Tracker insists that these are Ukrainian production systems, not trophy systems.

It is interesting why, in this case, the Ukrainian military-industrial complex did not immediately start the production of more modern and effective dynamic defense systems "Knife" and "Duplet", which are Ukrainian developments and were adopted in 2003 and 2009, respectively.